determintion of the budget and changes of lead and cadmium in the tissue of different fish species in haraze river (n. iran

pollutants of various sources and nature, including heavy metals, find their way into the haraz river .cadmium (cd) and lead (pb) concentrations and their fluctuations in the tissues of several fish species in the lower part of the river were investigated. the fish samples were caught by using electroshoker. using f.test and anova indicated different but significant , concentration of,these heavy metals in different species and tissues . however, no significant difference was found between adult and juvenile fish species